Christina, 31, couldn't stop smiling as she emerged with her boyfriend from her date night at Hollywood pizzeria Mozza.

Donned in her usual casual but stylish attire, the The Voice judge broke up her white T-shirt, leather jacket and leggings look with a trendy bright red flannel shirt.

She left her long blonde tresses down, showing off her hip pink dip dye hairstyle in the process.

Boyfriend Matthew was also dressed for comfort, but joined his pretty girlfriend in the red hot look by sporting a pair of red sneakers.

The couple have been dating since late 2010 and Matthew has managed to put a smile on the singer's face since her divorce from ex Jordan Bratman.

Great minds: Christina and her beau both spruced up their casual outfits by donning a hint of red

And earlier this year, Christina opened up to Marie Claire magazine about how much Matthew means to her.

'I've been through my highs, I've been through my lows; I've been through the gamut of all things in this business,' Christina said.

'Being too thin. Being bigger...It's noise I block out automatically. I love my body. My boyfriend loooooves my body. My son is healthy and happy, so that's all that matters to me.'

Through the highs and lows: The blonde songstress opened up about her new love earlier this year

The blonde singer has taken her frustration about the criticism of her weight to her music and recently released new track Your Body, which hit the number one spot on the US Hot Dance Club songs charts.

Speaking to The Advocate, the star said: 'Actually the message was more playful and took a stab at all the guys that use women. Here the woman had the upper hand and took her revenge in a very tongue and cheek way.'